Full-pure embedded load flow method and device for three-phase active power distribution network

Abstract

The embodiment of the invention provides a full-pure embedded load flow method and device for a three-phase active power distribution network, and the method comprises the steps: building a three-phase active power distribution network model which comprises a three-phase bus and a calculation node; under a network constraint condition, carrying out load flow calculation on the three-phase bus andthe calculation node to obtain power; if the power convergence is judged and known according to the convergence criterion value, judging whether a stepping voltage regulator exceeds a voltage limit ornot; and if it is judged and known that the stepping voltage regulator does not exceed the voltage limit, obtaining a load flow calculation result. According to the invention, the power flow under different scales of loads can be calculated at the same time, so that the voltage stability is improved, and the transmission network is balanced.

Description

technical field [0001] The invention relates to the field of electric power, in particular to a method and device for a purely embedded power flow of a three-phase active distribution network. Background technique [0002] Power flow calculation is a very important analysis and calculation of power system, which is used to study various problems raised in system planning and operation. The so-called power flow calculation is to calculate the bus voltage, current and power of each branch and network loss in the steady state operation of the power system with the known wiring mode, parameters and operating conditions of the power system. For the running power system, through the power flow calculation, it can be judged whether the grid bus voltage, branch current and power exceed the limit. If there is any limit, measures should be taken to adjust the operation mode. [0003] For the power system being planned, the power flow calculation can provide a basis for selecting the ...

AI Technical Summary

Problems solved by technology

[0004] The existing power flow calculation methods mainly include improved Newton method, optimal multiplier method, nonlinear programming method, homotopy method, etc., but these methods often fail to converge when faced with power flow calculations caused by high-power transmission. Therefore, there is an urgent need for a method that can overcome convergence failure in the face of power flow calculations caused by high-power transmission.

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